A wave with a frequency of 30 Hz travels along a string at speed of 36 m/s and reflects off a free end. The distance of the first node from the end of the string
A
0.2 m
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B
0.3 m
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C
0.4 m
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D
0.6 m
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Solution
The correct option is B0.3 m λ=3630=1.2m. An anti-node is formed at a distance of λ4 from the free end. Hence the distance = 1.24=0.3m